Hazard assessment of the debris flow using rough sets and Dempster-Shafer theory

A debris flow is a common geological hazard which brings loss of tremendous life property. Whether it will occur depends on many impact factors. Hazard assessment of debris flow aims to decide the hazard level of debris flow by analysing some impact factors. It is a critical step for forecasting the occurrence of debris flow disaster. In this paper, we propose a novel method, employing rough sets and Dempster-Shafer theory, to analyse the impact factors of debris flows. We first detailed the procedure, and then the samples of 37 debris flow gullies in Yunnan were utilized to evaluate the method. The result suggests that the method is effective and reliable.